Gas Supply - Empire Comfort Systems VFLL38FP30L Installation Instructions And Owner's Manual

Caution: Two gas line installations at the same time are
prohibited. The access plate to the switching means shall not be
opened while the heater is in operation.
The gas pipeline can be brought in through the right or left side of
the fireplace. The insert has a Flexline with shutoff valve located
on the left side when facing the unit. See Figures 23 and 24.
Consult the current National Fuel Gas Code, ANSI Z223.1 CAN/
CGA-B149 (.1 or .2) installation code.
Recommended Gas Pipe Diameter
Pipe Length Schedule 40 Pipe
Inside Diameter
Nat.
0-10ft 1/2"
11-40ft 1/2"
41-100ft 1/2"
101-150ft 3/4"
Caution: Never use plastic pipe. Check to confirm whether your
local codes allow copper tubing or galvanized.
Notice: Since some municipalities have additional local codes,
it is always best to consult your local authority and installation
code.
The use of the following gas connectors is recommended:
— ANSI Z21.24 Fireplace Connectors of Corrugated Metal
Tubing and Fittings.
— ANSI Z21.45 Assembled Flexible Fireplace Connectors of
Other Than All-Metal Construction
The above connectors may be used if acceptable by the authority
having jurisdiction. The Commonwealth of Massachusetts
requires that a flexible fireplace connector cannot exceed three
feet in length.
Installing the Main Gas Cock
Each fireplace should have its own manual gas cock.
A manual main gas cock should be located in the vicinity of the
unit and can be easily accessed after assembly. Where none
exists, or where its size or location is not adequate, contact your
local authorized installer for installation or relocation.
Compounds used on threaded joints of gas piping shall be
resistant to the action of liquefied petroleum gases. The gas lines
must be checked for leaks by the installer. Testing for leaks on all
exposed connections should be done with leak test solution or
a soap solution. After testing is complete, all solution should be
cleaned off. On unexposed connections, a pressure test should
be made.
Never use an exposed flame to check for leaks. Fireplace
must be disconnected from piping at inlet of control valve
and pipe capped or plugged for pressure test. Never
pressure test with fireplace connected; control valve will
sustain damage!
34846-2-1016

GAS SUPPLY

Tubing, Type L
Outside Diameter
L.P. Nat.
3/8" 1/2"
1/2" 5/8"
1/2" 3/4"
1/2" 7/8"
Figure 23
NOTICE: The millivolt gas controls are equipped with a captured
screw type pressure test point, therefore it is not necessary to
provide a 1/8" test point up stream of the control.
When using copper or flex connector use only approved fittings.
The fireplace and it's individual shut off valve must be
disconnected from supply piping system during any pressure
testing of that system at test pressures in excess of 1/2 psig
(3.5kPa).
The fireplace must be isolated from the gas supply piping system
by closing its individual manual shut off valve during any pressure
testing of the gas supply piping system at test pressures equal to
or less than 1/2 psig (3.5kPa).
Attention! If one of the procedures results in pressures in excess
L.P.
of 1/2 psig (14" w.c.) (3.5 kPa) on the fireplace gas valve, it will
result in a hazardous condition.
3/8"
1/2"
1/2"
3/4"
Shut off valve must be accessible after installation.
Checking Manifold Pressure
MILLIVOLT VALVES (VFLL(38,48)FP30)
Natural gas will have a manifold pressure of approximately 3.5"
w.c. for maximum input or 1.6" w.c. for minimum input at the
pressure regulator outlet with the inlet pressure to the pressure
regulator from a minimum of 4.5" w.c. for the purpose of input
adjustment to a maximum of 10.5" w.c.
Propane gas will have a manifold pressure approximately
10.0"w.c. (2.49kPa) for maximum input or 6.3"w.c. for minimum
input at the pressure regulator outlet with the inlet pressure to the
pressure regulator from a minimum of 11.0"w.c. for the purpose
of input adjustment to a maximum of 13.0"w.c.
INTERMITTENT PILOT VALVES (VFLL(38,48)FP90)
Natural gas will have a manifold pressure of approximately 3.5"
w.c. at the pressure regulator outlet with the inlet pressure to the
pressure regulator from a minimum of 7.0" w.c. for the purpose of
input adjustment to a maximum of 10.5" w.c.
Propane gas will have a manifold pressure approximately
10.0"w.c. at the pressure regulator outlet with the inlet pressure
to the pressure regulator from a minimum of 11.0"w.c. for the
purpose of input adjustment to a maximum of 13.0"w.c.
A test gage connection is located downstream of the gas
fireplace pressure regulator for measuring gas pressure. The
connection is a 1/8 inch N.P.T. plugged tapping.
Millivolt Control Valve
The valve regulator controls the burner pressure which should be
checked at the pressure test point. Turn captured screw counter
clockwise 2 or 3 turns and then place tubing to pressure gauge
over test point (Use test point "A" closest to control knob). After
taking pressure reading, be sure and turn captured screw
clockwise firmly to re-seal. Do not over torque. Check for gas
leaks.
Figure 24
Page 19